kkeps (VirtualGlobetrotting)
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Built in the 1970s after oil was discovered at Prudhoe Bay (1968), the 48-inch diameter, 800-mile pipeline links Prudhoe Bay on the Arctic Ocean with the terminal at Valdez, the northernmost ice-free port in the Western Hemisphere. The flow from this pipeline accounts for roughly 20 percent of U.S. oil production annually.